Service difficulty report · Floor Support · Boeing 7377H4

Difficulty date
August 18, 2023
Submitted
September 19, 2023
Operation
Air carrier
Aircraft
N904WN
Make and model
Boeing 7377H4
Aircraft serial
36616
Aircraft time
51,012 hours, 30,668 cycles
Part
Floor Support
Part number
UNKNOWN
Condition
Cracked
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WING CENTER SECTION FLOOR BEAM SUPPORT CRACKED AT BS 540; WL 208; LBL 44. (MARKED)<[01] REMOVED AND INSTALLED NEW PART PN 143A5240U31 FLOOR BEAM SUPPORT ON BS 540; WL 208; LBL 44 IAW 51-40-02 DWG 143A0060. AND TABLE MEASUREMENTS COMPLETED;[02] VERIFIED TASK COMPLETE.;[03] REMOVED AND INSTALLED NEW PART PN 143A5240U31 FLOOR BEAM SUPPORT ON BS 540; WL 208; LBL 44 IAW SRM 51-40-02-0G-0; SRM 51-40-05-0G-0; AND BOEING DWG 143A0060. AND TABLE MEASUREMENTS COMPLETED

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